package com.flyone.herbal.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.flyone.herbal.common.ErrorCode;
import com.flyone.herbal.constant.CommonConstant;
import com.flyone.herbal.constant.UserConstant;
import com.flyone.herbal.exception.BusinessException;
import com.flyone.herbal.model.dto.user.UserQueryRequest;
import com.flyone.herbal.model.entity.User;
import com.flyone.herbal.model.enums.UserRoleEnum;
import com.flyone.herbal.model.vo.LoginUserVO;
import com.flyone.herbal.model.vo.TotalVO;
import com.flyone.herbal.model.vo.UserVO;
import com.flyone.herbal.service.UserService;
import com.flyone.herbal.utils.MailUtils;
import com.flyone.herbal.utils.SqlUtils;
import com.flyone.herbal.mapper.UserMapper;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import static com.flyone.herbal.constant.RedisConstant.USER_LOGIN_KEY;

/**
 * 用户服务实现
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Resource
    private MailUtils mailUtils;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 盐值，混淆密码
     */
    private static final String SALT = "yupi";

    @Override
    public LoginUserVO userLogin(String userEmail, String code, HttpServletRequest request) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userEmail, code)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (code.length() != 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "验证码错误");
        }
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userEmail", userEmail);
        User user = this.baseMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            User newUser = new User();
            newUser.setUserEmail(userEmail);
            newUser.setUserRole("user");
            save(newUser);
            return this.getLoginUserVO(newUser);
        }
        String verifyCode = stringRedisTemplate.opsForValue().get(USER_LOGIN_KEY + userEmail);
        if (!code.equals(verifyCode)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "验证码错误");
        }
        // 3. 记录用户的登录态
        request.getSession().setAttribute(UserConstant.USER_LOGIN_STATE, user);
        return this.getLoginUserVO(user);
    }

    /**
     * 获取当前登录用户
     *
     * @param request
     * @return
     */
    @Override
    public User getLoginUser(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    @Override
    public User getAdminUser(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(UserConstant.ADMIN_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    /**
     * 获取当前登录用户（允许未登录）
     *
     * @param request
     * @return
     */
    @Override
    public User getLoginUserPermitNull(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            return null;
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        return this.getById(userId);
    }

    /**
     * 是否为管理员
     *
     * @param request
     * @return
     */
    @Override
    public boolean isAdmin(HttpServletRequest request) {
        // 仅管理员可查询
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User user = (User) userObj;
        return isAdmin(user);
    }

    @Override
    public boolean isAdmin(User user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

    /**
     * 用户注销
     *
     * @param request
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        if (request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE) == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    @Override
    public boolean adminLogout(HttpServletRequest request) {
        if (request.getSession().getAttribute(UserConstant.ADMIN_LOGIN_STATE) == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(UserConstant.ADMIN_LOGIN_STATE);
        return true;
    }

    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null) {
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtils.copyProperties(user, loginUserVO);
        return loginUserVO;
    }

    @Override
    public UserVO getUserVO(User user) {
        if (user == null) {
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user, userVO);
        return userVO;
    }

    @Override
    public List<UserVO> getUserVO(List<User> userList) {
        if (CollectionUtils.isEmpty(userList)) {
            return new ArrayList<>();
        }
        return userList.stream().map(this::getUserVO).collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String unionId = userQueryRequest.getUnionId();
        String mpOpenId = userQueryRequest.getMpOpenId();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(id != null, "id", id);
        queryWrapper.eq(StringUtils.isNotBlank(unionId), "unionId", unionId);
        queryWrapper.eq(StringUtils.isNotBlank(mpOpenId), "mpOpenId", mpOpenId);
        queryWrapper.eq(StringUtils.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StringUtils.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.like(StringUtils.isNotBlank(userName), "userName", userName);
        queryWrapper.orderBy(SqlUtils.validSortField(sortField), sortOrder.equals(CommonConstant.SORT_ORDER_ASC),
                sortField);
        return queryWrapper;
    }

    @Override
    public int getCode(String email) {
        // 生成6位随机验证码
        Boolean result = false;
        String isExist = stringRedisTemplate.opsForValue().get(USER_LOGIN_KEY + email);
        if (isExist != null) {
            mailUtils.sendMail(isExist, email);
            return 1;
        } else {
            String code = mailUtils.generateCode(4);
            result = stringRedisTemplate.opsForValue().setIfAbsent(USER_LOGIN_KEY + email, code, 10, TimeUnit.MINUTES);
        }
        return Boolean.TRUE.equals(result) ? 1 : 0;
    }

    @Override
    public LoginUserVO adminLogin(String userEmail, String password, HttpServletRequest request) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userEmail, password)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userEmail", userEmail);
        User user = this.baseMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR, "用户不存在");
        }
        // 3. 记录用户的登录态
        request.getSession().setAttribute(UserConstant.ADMIN_LOGIN_STATE, user);
        return this.getLoginUserVO(user);
    }
}
